Paper container



May ll, 1937. H. J. REITER v PAPER CONTAINER Filed Dec. 11, 1936 WITNESS HTTORNEY Patented May 11, 1937 UNITED STATES PATENT OFFICE PAPER coN'rAmEn Application December 11, 1936, Serial No. 115,295

6 Claims.

This invention relates to disposable containers, especially milk bottles and the like, made of paper or cardboard and impregnated with a water-proofing agent before they are filled and sealed to condition them for the market and includes certain improvements whereby such containers can be so made as to retain the requisite impermeability to their uid contents for a relatively long period, the invention being of especial utility when embodied in a paper bottle of the general character of that forming the sub ject of my pending application for U. S. Letters Patent, Serial No. 91,353, led July 18, 1936.

Thus a principal object of the invention is to provide in a bottle manufactured from a paper or cardboard blank certain improvements which enhance the effectiveness of the glued seam which secures together the two sides of the bottle formed by opposed end portions of the blank.

Another object of the invention is to provide a bottle blank having an area adapted to receive the adhesive in a smooth unbroken nlm, and a glue lap adapted for cooperation with said area to form a bottle of improved construction facili-v tating the subsequent formation of a satisfactory and effective top closure therefor after the bottle is lled.

Other objects, purposesand advantages of the invention will hereinafter more fully appear or will be understood from the following description of a preferred embodiment thereof illustrated in the accompanying drawing, in which:

Fig. 1 is a plan view of the blank of which the bottle is made and `having thereon the adhesive employed for uniting its sides.

Fig. 2 is a perspective view of the bottle formed therefrom with its top closure sealed and thus ready to be placed on the market.

Fig. 3 is a diagonal elevation of the bottle prior to being filled with the milkor other fluid it is to contain, the front portion being broken away to show the interior construction.

Fig. 4 is a fragmentary enlarged interior diagonal elevation of the upper front corner of the bottle after' the sealing of the top closure as shown in Fig. 2.

Fig. 5 is a further enlarged fragmentary vertical section of the bottle on the line 5--5 in Fig. 3.

Fig. 6 is a similarly enlarged fragmentary section of the blank on the line 6-6 in Fig. l and showing in detail the nature of the score lines impressed therein.

In' the several figures like characters are used to designate the same parts, the sections are taken in the direction of the arrows on the section lines, and the scores indented in the blanks are indicated in dot and dash lines in Figs. 1, 3 and 5.

More particularly, the blank B shown in Fig. 1 comprises four side panels I, 2, 3 and 4 arranged side by side and defined from each other by vertical scores 5, 6 and 1. A glue lap 8 projects from the free edge of the panel I from which it is dened by a score 9, and its bottom tab I0 extends slightly beyond the end of the panel at its lower end. The side panels also have bottom flaps I2 defined from their lower edges by transverse scores I3 and adapted to be folded inwardly, with the tab I0, and secured in the usual way to make a bottom for the bottle after the side panels have been folded up and theglue lap 8 glued to the panel 4.

The upper ends of the glue lap and side panels carry extensions I4-I8 inclusive, separated from these parts by a transverse score I9 which extends entirely across the glue lap and the panels I, 2 and 3 but terminates in the panel 4 at a point short of the free edge of the panel by about the width of the glue lap 8. At its opposite end the score I9 in crossing the glue lap is preferably continued as a knife score 2I, that is the fibers of the stock are cut on that side of the blank corresponding to the outer surface of the bottle but left uncut on the opposite surface as clearly appears from Figs. 4 and 5 and as hereinafter more fully explained. Adjacent their upper edges the extensions I5, I6 and Il are traversed by a score 22 which in prolongation also extends across the extension I8 to a point 23 short of its free edge and spaced therefrom a distance approximating the spacing of the point 20 at the corresponding end of the score I9.

The upper ends of the extensions I5 and I1 on the panels I and 3 are provided with locking tongues 24, 25 the first of which is separated from extension I5 by a score 26 while the extension I6 on panel 2 is provided with angular scores 21, 28 and a short central vertical score 29 extending upwardly from their point of intersection to facilitate the folding of extension l I5 between extensions I5 and Il in forming the top closure. The extension I8 on panel 4 is also provided with an angular score 3U and a central vertical score 3l adjacent its upper edge relower end of the score 3| downwardly toward` the upper corner of the panel 4. The score 32 however, terminates short of the corner of the panel at a point 33 in alignment with the points 20 and 23 at the ends of the horizontal scores I9 and 22. Preferably also the score I3L between the panel 4 land its bottom flap is terminated at a point 35 short of the free edge of the panel 4 in the same manner, so that the panel, its extension I8 and bottom flap I2 present for approximately the width of the glue lap and throughout their combined lengths a smooth, continuous surface which is unbroken and unobstructed by the ridges produced in other parts of one face of the stock by the scores impressed therein.

'Ihese scores are formed by pressing the stock between dies or by other mechanical means which form grooves X on one side of the stock and corresponding ridges Y on the opposite side, as clearly shown in Fig. 6, the ridges Y usually being disposed on the face which is to become the inside of the bottle in order to enhance its exterior appearance.- When an area of the blank to which the adhesive is to be applied is traversed by scores of this character, the glue wheel or other adhesive applying mechanism is deflected by the ridges Y and fails to contact or 'improperly contacts a portion of the stock adjacent thereto with the result that a smooth and uniform layer of adhesive cannot be deposited throughout the area so that when some other part of the blank is brought against it to form a glued seam, those portions of lit which have been skipped or improperly traversed by the glue wheel do not adhere properly to the other part and a leaky seam frequently results.

However, when .in` accordance with my invention the area to which the adhesive is to be applied, namely that adjacent the free edge of the panel 4, its extension I8 andthe upper part of its'bottom ap I2,- is free of scoring and there- -fore entirely smooth and flat, a strip orv lm of adhesive y36 may readily be deposited thereon in a uniform continuousy layer and when the blank is thereafter formed up the glue lap 8 is therefore held securely thereto throughout its entire length.

'I'he knife score 2| in the glue lap and near it an angular cut 31 extending entirely through the stock but terminating slightly short of the lateral edges of the glue lap are preferably provided in the blank in accordance with the disclosure of my said application, the angularity of this cut corresponding to that of the score 32 of which the cut is thus, in effect, a prolongation beyond the point 33 when the glue lap is brought into contact with the adhesive 36 in forming up the blank. The knife score 2| is then also aligned with and in prolongation beyond the point 20of the transverse score I9 and thus although a double thickness of material is provided where the glue lap contacts the panel 4 and its extension, the glue lap is weaker at the knife scoreand cut than elsewhere and as it is firmly secured to the panel 4 and its extension throughout its larea it constrains these parts to bend along lines registering with the knife score and cut respectively when mechanically folded in forming the top closure.

Thus as shownin Fig. 4, the knife score 2i spreads in folding to form a V-shaped notch opening toward the panel 4 and the angular cut 31 forms a V-shapedgroove or slot opening in the opposite direction, thereby affording suiiicie'nt yieldability in the glue lap to prevent tearing of the stock orexcessive strains on the material in localized areas.y If, as is usually the practice, the bottle is coated interlorly and exterlorly with a water-proofing agent prior to its being sealed the surfaces of the stock as well as the edges of the cut and knife score become impregnated with it so that the subsequent opening of the notch and groove as the top closure is formed presents no new and unimpregnated surfaces for contact with o-r absorption of the 4bottle contents.

It will now be apparent that my invention may be advantageously embodied in bottles of various types, among others, that shown in Patent 2,025,477 to Henry T. Scott, December 24, 1935 since its insures proper adherence of the glue lap throughout its length to the other parts of the bottle, and, further, for the reasons heretofore explained, that the invention is of particular utility when embodied in bottles of the type disclosed in my said application and thus comprising the knife score and cut to which I have herein referred.

It will of course be understood the foregoing description and accompanying drawing are but illustrative of one manner of practising the invention and that various changes and modications may be made therein if desired Without departing from the spirit and scope thereof as defined by the appended claims.

Having thus described inv invention, I claim and Kdesire to protect by Letters Patent of the United States:

v1. A bottle formed of foldable sheet material comprising a plurality of integral side panels each having a bottomflap on one of its ends and an extension on its opposite end respectively defined therefrom lby transverse scores, the transverse scores defining one panel from its extension and bottom flap terminating short of one of its longitudinalv edges, said extension having an angular score directed toward a point on said edge aligned with the score extended deiining the extension fromA the panel but terminating short of said edge in alignment with the correi spending ends ,of said transverse scores, an adhesive film coating the entire length of said panel and extension between said edge and the adjacent ends of said scores, and a glue lap integral with another panel and its extension engaging said adhesive lm throughout its length.

l l2. A bottle formed of foldable sheet material comprising a plurality of integral side panels each having a bottom ap on one of its ends and an extension on its opposite end, a glue lap carried by a side edge of one panel and its extension, the bottom flap on an adjacent panel being defined therefrom by a transverse score terminating short of a side edge of the panel a distance substantially corresponding to the width of the glue lap, the extension of the last mentioned panel being dened therefrom by a similar score and having an angularscore directed toward a point on said edge aligned with said last mentioned score but similarly terminating short of said edge, and a continuous lm of adhesive interposed between the glue lap and said last mentioned panel and its extension between the ends .of said scores and said side edge.

3. A bottle formed of foldable sheet material comprising a plurality of integral, side panels each having a bottom flap on one of'its ends and an extension on its opposite end, each panel and its extension being hinged to an adjacent panel and its extension, three of the latter being fully deflned'from their adjacent panels by a transverse score extending across saidr'panels and 75 partially across a fourth panel to thereby partiaily denne its extension therefrom, a glue lap dened from one of the rst mentioned panels by a longitudinal score and having a transverse knife score in prolongation of said transverse score and a cut extending angularly upwardly from adjacent the intersection of said longitudi-l nal score and the knife score, and a nlm `of adhesive interposed between the glue lap and the fourth panel for securing the glue lap thereto, the extension on the fourth panel having a score beginning at said' lm and extending angularly therefrom in alignment with the cut in the glue lap.

4. In a disposable bottle formed from a single unitary blank and comprising integral sides, a

bottom and extensions carried by the sidesadaptedto be folded to form a top closure, a glue lap integral with one of the sides and its extension disposed adjacent a second side and itsextension, said glue lap having a transverse knife score aligned with the jimctures between said sides and extensions and an angular cut adjacent the knife score, a nlm of adhesive interposed between the glue lap and said second side and its extension, a score partially-denlng said exten# sion from the second side extending toward the lm, terminating at its point of intersection therewith and aligned with said knife score, and an angular score in the extension of said second side extending toward the film, terminating at its point of intersection therewithy and aligned with said angular cut.

5. In a disposable bottle formed from a single unitary blank and comprising integral sides. a bottom and extensions carried by the sides, a glue lap extending longitudinally of one side and its. extension overlying an aiaoent side and its extensionfor an appreciable distance in proximity toits edge and a continuous flat illm of adhesive interposed between the glue lap and 'said 'adja cent side and extension, the last mentioned extension having scores along which it is adapted to be bent in forming a top closure for the bottle extending toward and terminating adjacent the area overlaid by said glue lap.

` 6. A blank for forming a disposable fluid container comprising a plurality of integral substantially rectangular panels adapted to form the container sides, panel extensions adapted to form a top-closure respectivelydefined from certain of the panels by transverse scores extending entirely across the latter, a glue lap extending longitudinally of one of said panels and its ex` tension and dened therefrom by a 'longitudinal score the transverse score defining another extension from its panel beingiof less length than the width of the latteryand terminating short of its outer edge a distance corresponding to the width of the glue lap, said last-mentioned extensionghaving* an Vangular score terminating a like distance short of said edge adapted to-facilitate the folding of the extension in forming the 'top- 

